Mounting base



FIG. 1 is a front view of the mounting base;

FIG. 2 is a back view of the mounting base;

FIG. 3 is a right side view of the mounting base;

FIG. 4 is a left side view of the mounting base;

FIG. 5 is a bottom view of the mounting base;

FIG. 6 is a top view of the mounting base;

FIG. 7 is a top angled perspective view of the mounting base; and,

FIG. 8 is a rear top angled perspective view of the mounting base.

CLAIM The ornamental design for a mounting base, as shown and described.